Overview
The vulnerability dubbed CVE-2025-55244, is an elevation of privilege vulnerability that affects Azure Bot Service. This issue is of significant concern due to its potential to compromise systems or leak data. Affected parties include organizations using Azure Bot Service, which is a widely popular cloud service provided by Microsoft. This vulnerability matters because it could allow an attacker to escalate their privilege level, potentially gaining unauthorized access to sensitive data or even taking control of the system.
Vulnerability Summary
CVE ID: CVE-2025-55244
Severity: Critical (CVSS Severity Score: 9.0)
Attack Vector: Network
Privileges Required: Low
User Interaction: None
Impact: System compromise, potential data leakage
Affected Products
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Product | Affected Versions
Azure Bot Service | All versions prior to the patch
How the Exploit Works
The CVE-2025-55244 vulnerability allows an attacker to escalate their privilege level within the Azure Bot Service. This is possible due to inadequate security restrictions within the service’s architecture. An attacker can exploit this vulnerability by sending specially crafted network requests to the Azure Bot Service. These requests could allow the attacker to bypass security measures and gain unauthorized access to sensitive data or even take control of the system.
Conceptual Example Code
Below is a conceptual example of how the vulnerability might be exploited. This is a sample HTTP request:
POST /AzureBotService/vulnerable_endpoint HTTP/1.1
Host: target.example.com
Content-Type: application/json
{
"malicious_payload": "escalate_privilege()"
}In this example, the attacker sends a POST request to a vulnerable endpoint of the Azure Bot Service. The “malicious_payload” in the request is a function or command that the Azure Bot Service executes, resulting in the escalation of the attacker’s privileges.
Mitigation Guidance
The recommended mitigation for this vulnerability is to apply the vendor-supplied patch. In the absence of the patch, organizations can deploy a Web Application Firewall (WAF) or Intrusion Detection System (IDS) as a temporary mitigation measure. These systems can help detect and block malicious network requests, helping to prevent exploitation of this vulnerability.
